如何辨别要用is are weren't wasn't were

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如何辨别要用isareweren''twasn''twere如何辨别要用isareweren''twasn''twere如何辨别要用isareweren''twasn''twere前两个现在时,表示现在的状态,后

如何辨别要用is are weren't wasn't were
如何辨别要用is are weren't wasn't were

如何辨别要用is are weren't wasn't were
前两个现在时,表示现在的状态,后面过去时,表示过去的状态.单数用一四,复数,你和虚拟语气用二五